Hinge.



JAMES I. MCKINNEY, OF PITTSBURGH, PENNSYLVANIA.

HINGE.

Specification of Letters Patent.

Patented May 19, 1914..

Application filed August 26, 1911. Serial No. 646,242.

To all 1071012142 may concern lo it known that 1, JAMES P. MGKINNEY, a citizen of the United States, and resident of Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Hinges; and I do hereby declare the following to be a full, clear, and exact description thereof.

My invention relates to steel hinges, and its object is to provide a light weight pressed steel hinge in which there shall be a full bearing of the body of the metal of the knuckles tormin g the barrel upon each other and upon the pintle, and the hinge itself shall be properly st'ili'ened both in the knuckle portions and in the body of the hinge to carry the load, and shall have a full bearing upon the surface of the door or other part to which the hinge is connected.

To these ends the invention comprises a pressed steel hinge having its body raised or pressed upwardly from its back face at the knuckle so as to form part of the knuckle which is bent to cylindrical form thus forming a cylindrical knuckle of the same diametor throughout and including therein the bent portion of the body.

It also consists in providing the knuckle with seats fitting onboth sides of such raised portion of the body of the hinge said. knuckle having lugs fitting in said seats to lock and support the knuckle while givii'ig it the cylindrical form.

It also comprises the employment of raised bosses forming screw head seats with depressed portions around said seats connected to the depressed. edge portion of the hinge body which stiffen the body and at the same time form an extended bearing surface on the face of the wooden door or other body to which the hinge is connected.

In the accompanying drawings Figure 1 is a plan view oi a hinge embodying the invention; Fig 2 is an underside view of the same; Fig. 3 is a longitudinal section on the line 8 3 Fig 2; Fig. a is a cross section on the line 4- l Fig. 1; Fig. 5 is a cross section on the line 5-5 Fig. 1; Fig. 6 is a perspective of a portion of one hinge strap indicating the manner in which the metal is bent to form the knuckle; and Fig. 7 is an enlarged side view to more clearly bring out the construction.

My invention may be employed with any suitable form of hinge, either a butt hinge or a strap hinge or a combination of the two. The drawing illustrates a combined butt and strap hinge in which 2 is the butt and 3 the strap, the butt having the two knuckles i and the strap the single knuckle 5, said knuckles forming the barrel of the hinge through which the pint-le 6 extends. ihe parts are made of relatively thin plate metal pressed to shape as illustrated to term a light strong hinge, the main plane of the hinge body being indicated along its edges, for example at the edge portion 7 oil? the butt hinge extending from the knuckles l entirely around its edge and the portions 8 ot the strap hinge extending from the knuckle forward to the end screw hole 9. The flat edge 7 of the butt is connected with the flat portions 10 and the flat edge 8 of the strap is connected with the flat portions 11, so forming the broad bearing faces of the hinge body upon the surface of the door or other part to which the hinge is connected. Between these surface bearing faces the metal of the hinge is pressed upwardly to impart strength to the hinge body. For example this is shown in the butt at 12, where a continuous sinuous raised portion is provided, and in the raised portions 13, i i, in the strap, such raised portions imparting great stiffness to the two hinge members. The screw seats 15 are formed in the depressed. portions10, 11, of the hinge, the metal being first :t'orced u nvardly to form the beveled screw bosses and thence downwardly to bring their bottom edges to the level of the main body of the hinge member, and the bases 16 of these screw seats thus act with the depressed portions 10, 11, to give ex tended hearings on the surface to which the hinge is to be connected, increasing the bearing surface in the same plane as the main body of the hii'ige member. In this way I am enabled to provide an ornamental. hinge oi light weight and great strength with a relatively large bearing surface especially disposed around the screw holes which prevents the metal at the screw holes from cutting into the wood body to which the hinge is connected; and in addition I provide in the strap portions 11 depressed portion connected to the side edge portions 8 of the body, forming bearing surfaces tor the hinge extending entirely across the strap at dilterent points.

It is important to provide for a continuous bearing of the hinge barrel on the pintle throughout the length of the knuckles of the members and also important to brace the knuckle portions and to stifien the hinge body close to the barrel, as, especially in strap hinges, this part receives the greateststrain. This is provided for in the hinge embodying the invention in the following way: The raised portion 13 is carried within the plane of the bend of the knuckle 5, and is extended to a point close to the pint-1e, such raised extension being shown at 17. The raised extension 17 is, however, narrowed somewhat, the body of the strap being carried in at the lower plane on each side of the raised portion 17, as at 1818, forming seats into which lugs 19 of the knuckle 5 enter and are seated, as well indicated in dotted lines in Fig. 6 and illustrated in Figs. 5 and 7. The end edge portion of the knuckle is provided with a recess 20 between the lugs 19, the bottom of which bears upon the raised extension 17 while the lugs 19 fit into the seats 18 on each side of said raised extension. In this way a cylindrical knuckle of the same interior diameter throughout its length is provided having no projections which might cut into the body of the pintle 6, and the lugs 19 and raised extension 17 of the body form a lock to sustain and include the parts 5 against displacement under strain, this very simple means bracing the part of the hinge on which the greatest strain is brought by a positive locking connection and supporting the turned over edge of the knuckle against vertical strain, immensely increasing the strength of the hinge. The same construction is employed with the knuckles a of the butt hinge which are numbered in like way but need no description. The metal forming the hinge members is pressed to shape, and the metal forming the knuckles is bent over into the cylindrical form, so providing square bearings at its edges of the full width of the metal of the hinge body, for example, at 21, 21, so that the knuckles of the two members forming the barrel have square bea ing surfaces upon each other well adapted to carry the load while the knuckles themselves are cylindrical throughout, and the bracing obtained by the fitting of the raised extension 17 with its seats 18 at each side with the recesses 20 and the lugs 19 which enter within the bent portion of the knuckle itself provides cylindrical knuckles of exceedingly strong construction adapted to carry heavy loads.

Practical use has proven that the hinge is durable and of great strength while it can be made at relatively low cost.

What I claim is:

1. A hinge member having a cylindrical knuckle portion and a body portion having a raised extension forming part of the knuckle and a depressed seat at the side of the raised extension, the knuckle having a lug fitting in said seat.

2. A hinge member having a cylindrical knuckle portion and a body portion having a raised extension forming part of the knuckle, and depressed seats at the sides of the raised extension, the knuckle having a depressed seat fitting over said raised extension and lugs entering said depressed seats.

3. A aressed steel hinge member having its main bearing surface along its edges, staggered screw seats extending above the bearing surface and depressed rings around the staggered screw seats forming bearing surfaces in the same plane as the main bearing surface and intermediate raised portions between the said depressed rings and the main edge portions of the hinge member, the intermediate raised portion adjacent the knuckle serving to support the knuckle against longitudinal distortion.

at. A hinge member having a cylindrical knuckle portion and a body portion having a raised extension forming part of the knuckle and extending within the knuckle to reinforce the hinge, and depressed seats at the sides of the raised extension, the knuckle having a depressed seat fitting over said raised extension and lugs entering said depressed seats whereby the knuckle is supported against longitudinal distortion in either direction.

5. A hinge, the members of which comprise cylindrical knuckle portions and body portions having raised surfaces extending toward the knuckles, said raised surfaces having depressed seats at the sides thereof and said knuckles having recesses meshing with said raised surfaces and lugs adjacent said recesses to engage in said seats, whereby said raised surfaces and said lugs mutually support each other against longitudinal distortion of the several knuckle portions.

In testimony whereof, I the said JAMES P. MCKINNEY have hereunto set my hand.

JAMES P. MoKINNEY.

lVitnesses \VM. A. Srmnarnrnn, JOHN F. WILL.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Eatents, Washington, D. 0. 

